Search Publications
A new Herschel view of the young star T54: not a transitional disk?
Prusti, T.; Pilbratt, G. L.; Huélamo, N. +10 more
Context. Observations of transitional disks give us an understanding of the formation of planets and planetary systems such as our own. But care must be taken in identifying such sources: the higher spatial resolution of the Herschel Space Observatory provides a new view of the origin of the far-infrared and submillimeter excesses observed.
A…
Flat-spectrum radio sources as likely counterparts of unidentified INTEGRAL sources
Gehrels, N.; Bird, A. J.; Landi, R. +5 more
Many sources in the fourth INTEGRAL/IBIS catalogue are still unidentified since they lack an optical counterpart. An important tool that can help in identifying and classifying these sources is the cross-correlation with radio catalogues, which are very sensitive and positionally accurate. Moreover, the radio properties of a source, such as the sp…
A cross-correlation method for measuring line formation heights in the solar photosphere
Faurobert, M.; Ricort, G.; Aime, C.
Context. Detailed 3D-simulations of magneto-convection in the solar photosphere are now available. They intend to capture the main physical mechanisms at play in this boundary layer, where complex physical phenomena, such as convective overshooting and small scale magnetic dynamo take place. But numerical limitations in spatial resolution and in b…
High angular resolution near-infrared integral field observations of young star cluster complexes in NGC 1365
Alloin, D.; Galliano, E.; Kissler-Patig, M. +1 more
This paper presents and examines new near-infrared integral field observations of the three so-called "embedded star clusters" located in the nuclear region of NGC 1365. Adaptive-optics-corrected K-band data cubes were obtained with the ESO/VLT instrument SINFONI. The continuum in the K-band and emission lines such as He I, Brγ, and several H…
Observations of the post-shock break-out emission of SN 2011dh with XMM-Newton
Ducci, L.; Sasaki, M.
Context. After the occurrence of the type cIIb SN 2011dh in the nearby spiral galaxy M 51 numerous observations were performed with different telescopes in various bands ranging from radio to γ-rays.
Aims: We analysed the XMM-Newton and Swift observations taken 3 to 30 days after the SN explosion to study the X-ray spectrum of SN 2011dh.
…
Chandra grating spectroscopy of three hot white dwarfs
Rauch, T.; Werner, K.; Kruk, J. W. +3 more
Context. High-resolution soft X-ray spectroscopic observations of single hot white dwarfs are scarce. With the Chandra Low-Energy Transmission Grating, we have observed two white dwarfs, one is of spectral type DA (
Dust shell model of the water fountain source IRAS 16342-3814
Izumiura, H.; Murakawa, K.
Aims: We investigate the circumstellar dust shell of the water fountain source IRAS 16342-3814.
Methods: We performed two-dimensional radiative transfer modeling of the dust shell, taking into account previously observed spectral energy distributions (SEDs) and our new J-band imaging and H- and KS-band imaging polarimetry obta…
Modelling of dust around the symbiotic Mira RR Telescopii during obscuration epochs
Kotnik-Karuza, D.; Jurkic, T.
Context. Symbiotic Miras represent a class of peculiar binaries whose nature is still not well understood. Physical properties of the circumstellar dust and associated physical mechanisms play an important role in understanding the evolution of symbiotic binaries and the interaction between their components. We present a model of inner dust region…
Chandra, Swift, and HST studies of the CXOM31 J004253.1+411422. Very bright X-ray transient in M 31
Moss, A.; Murray, S. S.; Garcia, M. R. +3 more
Context. A very bright transient X-ray source, CXOM 31 J004253.1+411422, was found by Chandra/HRC in the M 31 bulge. We present Chandra, Swift, and Hubble Space Telescope (HST) observations of this source.
Aims: Since this source is the brightest known X-ray transient in M 31, we want to study its nature with Chandra and Swift. Comparing the …
The dusty environment of HD 97300 as seen by Herschel and Spitzer
Prusti, T.; Pilbratt, G. L.; André, Ph. +9 more
Aims: We analyze the surroundings of HD 97300, one of two intermediate-mass stars in the Chamaeleon I star-forming region. The star is known to be surrounded by a conspicuous ring of polycyclic aromatic hydrocarbons (PAHs).
Methods: We present infrared images taken with Herschel and Spitzer using 11 different broad-band filters between 3…